package com.chaosyeb.server.config.security.component;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * @Description : 权限控制--判断用户角色
 * @Author : Chaos
 * @Date : 2021/12/8 16:30
 * @Version : 1.0
 **/
@Component
public class CustomerUrlDecisionManager implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
        for (ConfigAttribute configAttribute : configAttributes) {
            //当前url所需的角色
            String needRole = configAttribute.getAttribute();
            //判断角色是否登录，即可访问的角色，此角色在CustomerFilter中设置
            if("ROLE_LOGIN".equals(needRole)){
                //判断是否登录
                if(authentication instanceof AnonymousAuthenticationToken){
                    throw new UsernameNotFoundException("尚未登录，请先登录");
                } else {
                    return;
                }
            }
            //判断用户角色是否为url所需角色
            Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
            for (GrantedAuthority authority : authorities) {
                if (authority.getAuthority().equals(needRole)){
                    return;
                }
            }
        }
        throw new UsernameNotFoundException("权限不足，请联系管理员");
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return false;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return false;
    }
}
